Annular hole cutter

Details Annular hole cutter Annular hole cutter

1992-12-16

1994-01-25

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

408206, B23B 5104

Patent

active

052810607

ABSTRACT:
An annular hole cutter including a cylindrical body provided with a plurality of circumferentially spaced apart cutter teeth, including a first group of cutter teeth that have alternate radial inner cutting edges and a second group of cutter teeth that have alternate radial outer cutting edges that are staggered circumferentially rearwardly from the alternate radial inner cutting edges of the first group of cutter teeth. The cutting edges on the cutter teeth of both groups of cutter teeth each have a leading point, and the leading point of the cutting edges on one of said groups of cutter teeth extends downward longitudinally beyond the leading point of the cutting edges on the other of said groups of cutter teeth.

REFERENCES:
patent: Re33440 (1990-11-01), Hougen
patent: 3244035 (1966-04-01), Jehle et al.
patent: 3559513 (1971-02-01), Hougen
patent: 4573838 (1986-03-01), Omi et al.
patent: 4586857 (1986-05-01), Ohmi
patent: 4632610 (1986-12-01), Hougen

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